You will know when roots form all of a sudden the plant will perk. Tbh with your cuttings, and where you live, the cuttings should root in less than a month. Another thing I do is take an empty container and put the cuttings inside. Kinda like how you would put flowers in a vase. Just without the water. So you can check without disturbing the roots. Really the main reason I do this is I don't like to lie my cuttings down on my wooden bench in my garage because over time they get misshapen. Sometimes I stick the callused cuttings in my succulent mix, or do what I just wrote above. It's up to you. They will get roots without soil. Sedums are high light type of plants. If your S. clavatum is growing nice and compact, that should be plenty light for your Echeveria/Graptoveria:). You shouldn't need a grow light living in SD. I don't use them so I can't comment. All my succulents are outside. I believe they are specific growing lights, not just a regular lightbulb. You don't have a spot you could put them outside? Here's a pic of an Echeveria I turned into a cutting. It was starting to get a gooseneck. I'm just trying to show you what I meant by putting the cuttings in like you would put flowers in a vase:). There is nothing in the container just air and the cutting:). Depending on what size containers you use you could probably fit three rosettes in a three inch container. I think i answered all your questions. If not ask again:). Goodluck:). Pic of cuttings and leaves grown without soil. Just sittin in my garage on a wooden bench;).

The field is wide open ;)

Top-bottom/left-right: 1.Sedum rubrotinctum aka Jelly bean plant 2-3 are both Sedum, but not sure which. 4. Echeveria ‘Black Prince’ 5. Echeveria maybe Echeveria lilacina 6. Echeveria agavoides 7. Echeveria elegans aka Mexican Snowball 8. Echeveria not sure which. I have one that is similar it’s called Echeveria ‘Blue Atoll’. 9. Echeveria agavoides 10. Echeveria runyonii 'Topsy Turvy' 11. Echeveria agavoides crest 12. Haworthiopsis limifolia

It grows stacked - taller. Usually, more upright, so watch not to overwater. You can separate when repotting, but that will not stop plant from growing taller. Either bigger pot for all, or 3 separate pots (size of existing would be plenty for single plant). Flowers are quite insignificant - very small, on usually long stalk. You can keep it, or even cut off - your choice. I would use well draining mix. Here is the link to site Poly mentioned: HAWORTHIA/ HAWORTHIOPSIS